js 正则表达式，正整数

            var ss= "3.333";
            var type = /^[0-9]*[1-9][0-9]*$/;
            var re = new RegExp(type);
            alert(ss.match(re));
            if (ss.match(re) == null) {
                alert("请输入大于零的整数!");
                return;
            }